This malware departs from previous infections in a worrisome way, Landesman said. "With past infections, once you knew what to look for, it was fairly easy to find them," she said. "With this evolution, it's going to be much harder."
These kinds of attacks on hosting servers is a growing trend in the digital underground, replacing the old practice of mass registering domain names to be used for harmful activity, noted Paul Ferguson, vice president for threat intelligence at Internet Identity.
"There's been a dramatic decline in domains that were registered for sheer malicious purposes in favor of hacking servers and using them to perpetrate other crimes," he told CSO.
"Servers have become the low hanging fruit," he said.
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